According to this page: http://askubuntu.com/questions/511370/applications-can-no-longer-access-your-online-account/514261#514261 the problem seems to be related to evolution-data-server to access google calendar. May be this helps to get closer to the bug. The problem is really annoying especially to ordinary users.
felix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1318834 Title: Applications can no longer access your @gmail.com Online Account To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center-signon/+bug/1318834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs